Global Patent Index - EP 0952165 A1

EP 0952165 A1 1999-10-27 - Production of polyethylene having improved mechanical properties

Title (en)

Production of polyethylene having improved mechanical properties

Title (de)

Herstellung von Polyethylene mit verbesserten mechanischen Eigenschaften

Title (fr)

Préparation de polyéthylène ayant des propriétés mécaniques améliorées

Publication

EP 0952165 A1 (EN)

Application

EP 98107493 A

Priority

EP 98107493 A

Abstract (en)

A process for producing a polyethylene resin having improved mechanical properties, the process comprising polymerising ethylene in the presence of a chromium-based catalyst to make polyethylene homopolymer in a first polymerisation reactor and in a second polymerisation reactor downstream of the first polymerisation reactor copolymerising ethylene in the presence of the chromium-based catalyst and a co-catalyst from ethylene monomer and comonomer generated in-situ in the second polymerisation reactor to make polyethylene copolymer.

IPC 1-7 (main, further and additional classification)

C08F 210/02; C08F 2/00; C08F 4/69

IPC 8 full level (invention and additional information)

C08F 2/00 (2006.01); C08F 2/06 (2006.01); C08F 2/34 (2006.01); C08F 4/69 (2006.01); C08F 4/78 (2006.01); C08F 210/02 (2006.01)

CPC (invention and additional information)

C08F 210/02 (2013.01)

Combination set (CPC)

C08F 210/02 + C08F 2/001

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family

EP 0952165 A1 19991027; AU 4032399 A 19991116; DE 69936343 D1 20070802; DE 69936343 T2 20080221; EP 1082367 A1 20010314; EP 1082367 B1 20070620; JP 2000063422 A 20000229; US 6265500 B1 20010724; WO 9955749 A1 19991104